In search ofQ2Q¯2mesons inJ/ψradiative decays
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Abstract
The branching ratios and the ratios of the helicity amplitudes (x and y) of the processes \ensuremath{\rightarrow}\ensuremath{\gamma}VV are calculated. The calculated branching ratio for \ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\rho} $^{0}\mathrm{\ensuremath{\rho}}^{0}$ is compatible with the recent experimental data and its y value is quite distinct from those measured in J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\theta}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\eta}\ensuremath{\eta},\ensuremath{\gamma}KK\ifmmode\bar\else\textasciimacron\fi{}. The processes \ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\omega} \ensuremath{\omega},\ensuremath{\gamma}${K}^{\mathrm{*}}$K${\ifmmode\bar\else\textasciimacron\fi{}}^{\mathrm{*}}$ are predicted to have large branching ratios and could be found in J/\ensuremath{\psi} radiative decays. The branching ratio for \ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\varphi} \ensuremath{\varphi} is calculated to be smaller than that of \ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\rho} $^{0}\mathrm{\ensuremath{\rho}}^{0}$ by two orders of magnitude.
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